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323 Matching Results
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300 Area Uranium Leach and Adsorption Project
The objective of this study was to measure the leaching and adsorption characteristics of uranium in six near-surface sediment samples collected from the 300 Area of the Hanford Site. Scanning electron micrographs of the samples showed that the uranium contamination in the sediments is most likely present as co-precipitates and/or discrete uranium particles. Molecular probe techniques also confirm the presence of crystalline discrete uranium bearing phases. In all cases, the uranium is present as oxidized uranium (uranyl [U(VI)]). Results from the column leach tests showed that uranium leaching did not follow a constant solubility paradigm. Four of the five contaminated sediments showed a large near instantaneous release of a few percent of the total uranium followed by a slower continual release. Steady-state uranium leachate concentrations were never measured and leaching characteristics and trends were not consistent among the samples. Dissolution kinetics were slow, and the measured leach curves most likely represent a slow kinetically controlled desorption or dissolution paradigm. Batch adsorption experiments were performed to investigate the effect of pH and uranium and carbonate solution concentrations on uranium adsorption onto the uncontaminated sediment. Uranium adsorption Kd values ranged from 0 to > 100 ml/g depending on which solution parameter was …
Date:
November 26, 2002
Creator:
Serne, R. Jeffrey; Brown, Christopher F.; Schaef, Herbert T.; Pierce, Eric M.; Lindberg, Michael J.; Wang, Zheming et al.
Object Type:
Report
System:
The UNT Digital Library
Acclerator R&D for a Linear Collider
The goal of this project was to perform simulations of beam transport in linear colliders, with an emphasis on emittance dilution, spin polarization transport, and development and testing of beam based tuning algorithms. Our simulations are based on an existing object-oriented particle-tracking library, Bmad. To facilitate the efficient development of simulations, an accelerator design and analysis program based on Bmad has been developed called Tao (Tool for Accelerator Optics). The three beam-based alignment algorithms, Dispersion Free Steering, Ballistic Alignment (BA), and the Kubo Method have been implemented in Tao. We have studied the effects of magnet misalignments, BPM resolution, beam jitter, stray fields, BPM and steering magnet failure and the effects of various cavity shape wakefields. A parametric study has been conducted in the presence of the above types of errors for all three alignment algorithms. We find that BPM resolution has only modest impact on the effectiveness of beam based alignment. The DFS correction algorithm was found to be very robust in situations where there were BPM and/or steering magnet failures. The wakefields in the main linac are very weak and cause negligible emittance growth. Spin tracking was extended to study all accelerator components between the damping ring and …
Date:
November 26, 2008
Creator:
Rubin, D.L.; Dugan, G.; Gibbons, L.; Palmer, M.; Patterson, R.; Sagan, D. et al.
Object Type:
Report
System:
The UNT Digital Library
Advances in National Capabilities for Consequence Assessment Modeling of Airborne Hazards
This paper describes ongoing advancement of airborne hazard modeling capabilities in support of multiple agencies through the National Atmospheric Release Advisory Center (NARAC) and the Interagency Atmospheric Modeling and Atmospheric Assessment Center (IMAAC). A suite of software tools developed by Lawrence Livermore National Laboratory (LLNL) and collaborating organizations includes simple stand-alone, local-scale plume modeling tools for end user's computers, Web- and Internet-based software to access advanced 3-D flow and atmospheric dispersion modeling tools and expert analysis from the national center at LLNL, and state-of-the-science high-resolution urban models and event reconstruction capabilities.
Date:
November 26, 2007
Creator:
Nasstrom, J; Sugiyama, G; Foster, K; Larsen, S; Kosovic, B; Eme, B et al.
Object Type:
Article
System:
The UNT Digital Library
Advantages of High Order Schemes and How to Confirm These Advantages
This manuscript is meant to give a short summary of the advantages of high order schemes and suitable test problems which can properly illustrate these advantages.
Date:
November 26, 2001
Creator:
Jameson, L
Object Type:
Report
System:
The UNT Digital Library
Aerosol climate effects and air quality impacts from 1980 to 2030
We investigate aerosol effects on climate for 1980, 1995 (meant to reflect present-day) and 2030 using the NASA Goddard Institute for Space Studies climate model coupled to an on-line aerosol source and transport model with interactive oxidant and aerosol chemistry. Aerosols simulated include sulfates, organic matter (OM), black carbon (BC), sea-salt and dust and additionally, the amount of tropospheric ozone is calculated, allowing us to estimate both changes to air quality and climate for different time periods and emission amounts. We include both the direct aerosol effect and indirect aerosol effects for liquid-phase clouds. Future changes for the 2030 A1B scenario are examined, focusing on the Arctic and Asia, since changes are pronounced in these regions. Our results for the different time periods include both emission changes and physical climate changes. We find that the aerosol indirect effect (AIE) has a large impact on photochemical processing, decreasing ozone amount and ozone forcing, especially for the future (2030-1995). Ozone forcings increase from 0 to 0.12 Wm{sup -2} and the total aerosol forcing increases from -0.10 Wm{sup -2} to -0.94 Wm{sup -2} (AIE increases from -0.13 to -0.68 Wm{sup -2}) for 1995-1980 versus 2030-1995. Over the Arctic we find that compared to …
Date:
November 26, 2007
Creator:
Menon, Surabi; Menon, Surabi; Unger, Nadine; Koch, Dorothy; Francis, Jennifer; Garrett, Tim et al.
Object Type:
Article
System:
The UNT Digital Library
Afghanistan: Post-War Governance, Security, and U.S. Policy
This report considers the debate on the efficacy of U.S. efforts to stabilize Afghanistan. Moreover, the report discusses how the Bush Administration's review of the progress resulted as inadequate, and thus ways of changing progress are being considered. The report also discusses the NATO led troops in the region.
Date:
November 26, 2008
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 134, No. 27, Ed. 1 Thursday, November 26, 2009
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
November 26, 2009
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
ALSNews 2008
Compilation of Advanced Light Source newsletter, ALSNews, for 2008, Volumes 283-293.
Date:
November 26, 2008
Creator:
McCullough (Ed.), Julie & Tamura (Ed.), Lori
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 101, No. 221, Ed. 1 Sunday, November 26, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 102, No. 230, Ed. 1 Monday, November 26, 2001
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2001
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 104, No. 215, Ed. 1 Tuesday, November 26, 2002
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2002
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 105, No. 217, Ed. 1 Wednesday, November 26, 2003
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2003
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 106, No. 198, Ed. 1 Friday, November 26, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 108, No. 205, Ed. 1 Sunday, November 26, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 109, No. 152, Ed. 1 Monday, November 26, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Times (Altus, Okla.), Vol. 110, No. 97, Ed. 1 Wednesday, November 26, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
November 26, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, November 26, 2003
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2003
Creator:
Schwind, Jim & Looby, Edward
Object Type:
Newspaper
System:
The Portal to Texas History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 109, No. 95, Ed. 1 Sunday, November 26, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2000
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The Alvin Sun (Alvin, Tex.), Vol. 110, No. 96, Ed. 1 Monday, November 26, 2001
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2001
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The Amending Process in the Senate
This report describes the amending process in the Senate, including debating amendments, classification, precedence, amendment trees, restrictions, and voting.
Date:
November 26, 2007
Creator:
Palmer, Betsy
Object Type:
Report
System:
The UNT Digital Library
Application of the Scenario Planning Process - a Case Study: The Technical Information Department at the Lawrence Livermore National Laboratory
When the field of modern publishing was on a collision course with telecommunications, publishing organizations had to come up to speed in fields that were, heretofore, completely foreign and technologically forbidding to them. For generations, the technology of publishing centered on offset lithography, typesetting, and photography--fields that saw evolutionary and incremental change from the time of Guttenberg. But publishing now includes making information available over the World Wide Web--Internet publishing--with its ever-accelerating rate of technological change and dependence on computers and networks. Clearly, we need a methodology to help anyone in the field of Internet publishing plan for the future, and there is a well-known, well-tested technique for just this purpose--Scenario Planning. Scenario Planning is an excellent tool to help organizations make better decisions in the present based on what they identify as possible and plausible scenarios of the future. Never was decision making more difficult or more crucial than during the years of this study, 1996-1999. This thesis takes the position that, by applying Scenario Planning, the Technical Information Department at LLNL, a large government laboratory (and organizations similar to it), could be confident that moving into the telecommunications business of Internet publishing stood a very good chance of …
Date:
November 26, 2001
Creator:
Schuster, J A
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Archer Advocate (Holliday, Tex.), Vol. 1, No. 34, Ed. 1 Wednesday, November 26, 2003
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2003
Creator:
Thomas, John
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 48, Ed. 1 Thursday, November 26, 2009
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
November 26, 2009
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Army Corps of Engineers Water Resources Activities: Authorization and Appropriations
This report provides an overview of the Corps civil works program. It covers the congressional authorization and appropriation process, the standard project development process, and other Corps activities and authorities.
Date:
November 26, 2008
Creator:
Carter, Nicole T. & Hughes, H. S.
Object Type:
Report
System:
The UNT Digital Library